1282768957 has 4 divisors (see below), whose sum is σ = 1283008896. Its totient is φ = 1282529020.

The previous prime is 1282768913. The next prime is 1282768967. The reversal of 1282768957 is 7598672821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7598672821 = 373 ⋅20371777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1282768957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1282768898 and 1282768907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282768967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111763 + ... + 122704.

It is an arithmetic number, because the mean of its divisors is an integer number (320752224).

Almost surely, 2^1282768957 is an apocalyptic number.

It is an amenable number.

1282768957 is a deficient number, since it is larger than the sum of its proper divisors (239939).

1282768957 is an equidigital number, since it uses as much as digits as its factorization.

1282768957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239938.

The product of its digits is 3386880, while the sum is 55.

The square root of 1282768957 is about 35815.7640851064. The cubic root of 1282768957 is about 1086.5494104329.

The spelling of 1282768957 in words is "one billion, two hundred eighty-two million, seven hundred sixty-eight thousand, nine hundred fifty-seven".